Join Date: Dec 2006
Location: Dirty Bay, Texas
I am not sure this answers your question, but having your VIN run by the dealership will clear up any confusion.
RPO codes for one year do NOT always carry over from one year to the next and mean the same thing from one model to the next, so I am sure trannies are no exception.
Think about Z71 RPO code. On the older trucks, it was a RPO that could ONLY be added to a vehicle with 4x4. This held true until the Colorado came along and it was an offroad package that could be added to the 2wd or 4wd.
Also, if you have all of your RPO codes from your VIN and look them up in a GM white book, then some of them will NOT make sense at all. Whereas if you have GM run the VIN, then they seem to tie in better with explanations with the specific vehicle. Just my opinion.
2005 CTSV BLACK LS7 Clutch/Flywheel/Slave, Tick Speed Bleeder, Tilton Clutch MC, RevShift Bushings, Domestic V8 Solutions (shifter, 8.8 Diff conversion, srut tower braces, sub-frame connectors), SLP cats, no cags, xpipe, bullet mufflers, Volante, iPod dock, G-force tune; 379hp 381tq.
Killing 5th gens like it is my job.